CVE-2026-21939: High severity Oracle Oracle Database Server SQLcl vulnerability
Vulnerability in the SQLcl component of Oracle Database Server. Supported versions that are affected are 23.4.0-23.26.0. Difficult to exploit vulnerability allows unauthenticated attacker with logon to the infrastructure where SQLcl executes to compromise SQLcl. Successful attacks require human interaction from a person other than the attacker. Successful attacks of this vulnerability can result in takeover of SQLcl. CVSS 3.1 Base Score 7.0 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H).
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-21939?
CVE-2026-21939 is classified as a difficult-to-exploit vulnerability in the SQLcl component of Oracle Database Server.
How do I fix CVE-2026-21939?
To mitigate CVE-2026-21939, update SQLcl to a version beyond 23.26.0 as provided in the vendor's security update.
Who is affected by CVE-2026-21939?
CVE-2026-21939 affects users of Oracle Database Server SQLcl versions 23.4.0 through 23.26.0.
What potential impact does CVE-2026-21939 have?
CVE-2026-21939 may allow an unauthenticated attacker with logon access to compromise SQLcl and escalate their privileges.
Is user intervention required to exploit CVE-2026-21939?
Yes, successful exploitation of CVE-2026-21939 requires human involvement in the attack process.